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Answer the following questions based on a hot cathode ray tube.
What will happen to the beam when it passes through the electric field?
Concept: Radioactivity
State three factors on which the rate of emission of electrons from a metal surface depends
Concept: Radioactivity
Why do Free electrons not leave the metal surface on their own
Concept: Radioactivity
How can they be made to leave the metal surface? (State any two ways)
Concept: Radioactivity
An element `""_ZS^A` decays to `""_85R^222` after emitting 2 α particles and 1 β particle.
Find the atomic number and atomic mass of the element S.
Concept: Radioactivity
A radioactive substance is oxidized. Will there be any change in the nature its radioactivity? Give a reason for your answer
Concept: Radioactivity
Arrange α, β, and γ rays in ascending order with respect to their
1) Penetrating power.
2) Ionising power
3) Biological effect
Concept: Radioactivity
In a cathode ray tube, what is the function of anode?
Concept: Radioactivity
State the energy conversion taking place in a cathode ray tube
Concept: Radioactivity
Represent the change in the nucleus of a radioactive element when a β particle is emitted.
Concept: Radioactivity
Under which conditions does the nucleus of an atom tend to radioactive?
Concept: Radioactivity
Why is a cathode ray tube evacuated to a low pressure?
Concept: Radioactivity
What happens if the negative potential is changed on a grid?
Concept: Radioactivity
Name a gas caused by the Greenhouse effect
Concept: Radioactivity
Name the unit in which the work function of a metal is expressed.
Concept: Radioactivity
Complete the diagram as given above by drawing the deflection of radioactive radiations in an electric field
Concept: Radioactivity
State any two precautions to be taken while handling radioactive substances
Concept: Radioactivity
